Host msys2 on our servers and verify checksum

Wrt #836

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Revision history for ghcup
 
+## 0.1.19.5 -- ????-?-??
+
+* support JS cross compilers wrt [#838](https://github.com/haskell/ghcup-hs/issues/838)
+
 ## 0.1.19.4 -- 2023-7-02
 
 * fix missing TUI for aarch64 linux binaries

docs/install.md

@@ -318,6 +318,24 @@ export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"
 
 All set. You can run `cabal init` now in an empty directory to start a project.
 
+## Esoteric distros
+
+### Void Linux
+
+Since void linux can be installed with glibc and musl, it's hard to support correctly with ghcup.
+One way to make ghcup work on **Void Linux musl** is to follow the [Overriding distro detection](../guide/#overriding-distro-detection)
+section and tell it to consider Alpine bindists only. E.g.:
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_MINIMAL=1 sh
+source ~/.ghcup/env
+ghcup config set platform-override '{ "arch": "A_64", "platform": { "contents": "Alpine", "tag": "Linux" }, "version": "3.17" }'
+ghcup install cabal --set latest
+ghcup install ghc --set latest
+ghcup install stack --set latest
+ghcup install hls --set latest
+```
+
 ## Vim integration
 
 See [ghcup.vim](https://github.com/hasufell/ghcup.vim).

ghcup.cabal

@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               ghcup
-version:            0.1.19.4
+version:            0.1.19.5
 license:            LGPL-3.0-only
 license-file:       LICENSE
 copyright:          Julian Ospald 2020

scripts/bootstrap/bootstrap-haskell.ps1

@@ -40,10 +40,13 @@ param (
     # Whether to disable use of curl.exe
     [switch]$DisableCurl,
     # The Msys2 version to download (e.g. 20221216)
-    [string]$Msys2Version
+    [string]$Msys2Version,
+    # The Msys2 sha256sum hash
+    [string]$Msys2Hash
 )
 
 $DefaultMsys2Version = "20221216"
+$DefaultMsys2Hash = "18370d32b0264915c97e3d7c618f7b32d48ad80858923883fde5145acd32ca0f"
 
 $Silent = !$Interactive
 
@@ -430,9 +433,12 @@ if (!(Test-Path -Path ('{0}' -f $MsysDir))) {
 	if (!($Msys2Version)) {
 		$Msys2Version = $DefaultMsys2Version
 	}
+	if (!($Msys2Hash)) {
+		$Msys2Hash = $DefaultMsys2Hash
+	}
     Print-Msg -msg ('Downloading Msys2 archive {0}...' -f $Msys2Version)
     $archive = ('msys2-base-x86_64-{0}.sfx.exe' -f $Msys2Version)
-    $msysUrl = ('https://repo.msys2.org/distrib/x86_64/{0}' -f "$archive")
+    $msysUrl = ('https://downloads.haskell.org/ghcup/msys2/{0}' -f "$archive")
     $archivePath = ('{0}\{1}' -f ([IO.Path]::GetTempPath()), "$archive")
 
     if ((Get-Command -Name 'curl.exe' -ErrorAction SilentlyContinue) -and !($DisableCurl)) {
@@ -440,6 +446,11 @@ if (!(Test-Path -Path ('{0}' -f $MsysDir))) {
     } else {
       Get-FileWCSynchronous -url "$msysUrl" -destinationFolder ([IO.Path]::GetTempPath()) -includeStats
     }
+	$Msys2HashChecked = Get-FileHash -Algorithm SHA256 "${archivePath}"
+	if (!($Msys2HashChecked.Hash -eq $Msys2Hash)) {
+		Print-Msg -color Red -msg ("Hashes don't match, got {0}, but expected {1}" -f $Msys2HashChecked, $Msys2Hash)
+		Exit 1
+	}
 
     Print-Msg -msg 'Extracting Msys2 archive...'
     $null = & "$archivePath" '-y' ('-o{0}' -f $GhcupDir)  # Extract

scripts/releasing/pull_release_artifacts.sh

@@ -29,7 +29,7 @@ gh release download "$RELEASE"
 
 # cirrus
 curl -L -o "x86_64-portbld-freebsd-ghcup-${TAG}" \
-	"https://api.cirrus-ci.com/v1/artifact/github/haskell/ghcup-hs/build/binaries/out/x86_64-portbld-freebsd-ghcup-${RELEASE}?branch=${RELEASE}"
+	"https://api.cirrus-ci.com/v1/artifact/github/haskell/ghcup-hs/build/binaries/out/x86_64-portbld-freebsd-ghcup-${TAG}?branch=${RELEASE}"
 
 sha256sum ./*-ghcup-* > SHA256SUMS
 gpg --detach-sign -u "${SIGNER}" SHA256SUMS